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' J. OYMEARA. ELECTRIC DAMPER REGULATOR.

No. 443,716. Patented Dec. 30, 1 890.

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No. 443,716. Patented Dec. 30, 1890.

OZFII ITJVESSES UNITED- STATES JEREMIAH OMEARA,

ATEN-T. OFF E.

OF NEIV YORK, N. Y.

ELECTRIC DAM PER-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 443,716, dated December 30, 1890.

Application filed May 2, 1890. Serial No. 850,300. (No model.)

1'0 all whom it may concern:

Be it known that I, JEREMIAH OMEARA, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Electric Damper- Regulators, of which the following is a full, clear, and exact description.

This invention relates to a thermo-electric device for the automatic control of furnacedampers, ventilators, and other objects.

The principle of the invention is embodied in the utilization of the expansion of German-silver wires or equivalent electric conductors when charged for operating such devices one way, the return of such devices being effected by the contraction of the conductors when the current is cut off.

In the accompanying drawings, illustrating m yinvention, in the several figures of which like parts are similarly designated, Figure 1 is a partly-sectional elevation of a stationary boiler the draft-damper of which is controlled in accordance with my invention. Fig. 2 shows my arrangement of the expansihle conductors as the said conductors will appear when expanded. Fig. 3 shows a steam-gage modified for use as a circuit-closer. Fig. 4 shows the invention as appliedto a watergage fora boiler. Fig. 5 shows the invention used in connection with a thermostat, and Fig. 6shows the invention applied for operating a transom for a door. Fig. 7 is a diagranimatic View illustrating the use of an alarm in connection with my invention.

I have illustrated these uses of the in vention, but do not intend thereby to limit my said invention to these specific uses and instrumentalities.

In Fig. 1,66 may representa stationary boil r, and b its draft-flue, the said draft-flue being provided with an ordinary damper c. This damper in the instance shown has its shaft (Z extended, and to this shaft is fixed an overbalancing device a.

A length of German-silver or equivalent conducting-wire f is passed back and forth over insulated pegs g to constitute what I designate my expansion device. From this expansion device extends a cord, chain, rod, or other device h, which is secured to the said wires, but insulated therefrom in any suitable manner, and is also connected with the overbalancing device 6. Normally this connector it will be secured to the overbalancing device 6 in such manner as to hold open the damper c. The expansion device is adapted to be connected with an electric-light circuit or other equivalent electric circuit, and for the purpose of my invention I inter-pose an automatic cut-out i, adapted to be burned out by a current of slightly less force than that necessary to burn out the expansion device, so as to prevent the destruction of the expansion device.

The pressure-regulatorj of the boiler is provided with a metallic contact-piece 7e,and the conductorf is divided on opposite sides of this contact-piece and provided with contactpieces, so that when there is undue pressure in the boiler the pressure-regulator diaphragm will be moved up into contact with the divided expansion device and-complete the cir cuit from the light or other equivalent circuit, and the expansion device then becoming heated and expanding will permit the connector h to descend, and thereby permit the overbalancing device 6 to close the damper more or less, and so reduce the draft, and so automatically regulate the pressure in the boiler. duced sufficiently to break the circuit, then the expansion device fis free to resume its normal position as it cools and contracts, and thereby the damper will be again gradually opened to increase the fire and the steam.

The deflection of the expansion device is illustrated in Fig. 2. In that figure also is shown a circuit-closing key Z, which may be used instead of the pressure-regulator or in conjunction with it.

In Fig. 3 the pressure-gage is shown as having its index or pointer m provided with a contact-piece n, which is adapted to come into contact with the contact-pieces 0, secured to posts 19, which receive the ends of the light cir cuit leading to the expansion device, in order that the fires maybe regulated in accordance with the pressure of steam at any predetermined height.

In Fig. 4: the expansion device may be used in connection with the water-gage q. \Vhen As soon as the pressure is rethe glass of the water-gage breaks, the room is instantly tilled with escaping steam and the attendant is in danger of being scalded should he go into the room to turn oft the steam. Nongif the expansion device be connected to the valves q q of the water-gage by means of the connector hand the glass should break, all the attendant would have to do would be to turn on the current by a switch placed in a convenient part of another room, whereby upon the expansion of the expansion device the valves would drop and shut off the steam.

In Fig. 5, 1' may represent a thermostat of ordinary construction, which is interposed in the expansion device in order automatically to apply and cut out the current at a given heat.

In Fig. 6 the expansion device is shown as applied to a door-transom s, which has one of its pintlest extended laterally and providedwith an overbalancing device u. In this connection I would employ a switch or keyl to operate the expansion device and open or close thetrausom, according to the manner in which it may have been primarily set. This application of the expansion device is especially valuable where such transoms are located at such a height as to be not readily accessible; and very obviously my invention is clearly applicable for operating movable devices not easily accessible or which are dangerous of access at any time.

\Vhere the expansion device is automatically operated it may also be connected with an alarm mechanism, so as to give audible or visible notice of its operation at a distant point. (See, for example, Fig. 7.) The 0011- uector 7!, which may lead to any object to be n1ovecl,has a contact device h set in between terminals 7L2 h o'f an electric circuit 7t", which latter includes batteries 71; and a bell 7L5.

\l'hat I claim is- 1. An electric regulating device comprising an electric conductor adapted to be expanded by the heat of an electric current therein, and an electric circuit and a circuit-controller for including said conductor in said circuit when conditions extraneous to the circuit render such inclusion necessary or desirable, combined with a damper or other movable device actuated by the expansion and contraction of the said conductor, substantially as and for the purpose described.

2. An electric conductor adapted to be expanded by the heat of an electric current therein and stretched over suitable pegs or supports and adapted to be charged from a light or other circuit, combined with an elec tric circuit and a circuit-controller for including such conductor in the circuit when conditions extraneous to the circuit render such inclusion necessary or desirable, and a connector for uniting the said expansion device and an object to be moved, substantially as described.

8. The expansion device herein so called, consisting of a coil of expansible wire, a furmace-damper, a connector between the furpace-damper and the expansion device, and a body having motion such as a pressureregulator,-prcssnre-gage, or other device on a boiler for making and breaking the circuit for charging the said expansion device, combined with an electric circuit in which the expansion device is included by such body having motion when conditions extraneous to said circuit render such inclusion necessary or dcsirable, substantially as described.

In testimonywhereofl have hereunto set my hand this 30th day of April, A. D. 1890.

JEREMIAH OMEARA.

lVitnesses:

J. II. CURRY, John T). HOUSTON. 

